blue nail

例句：

1. 1. She had a blue nail polish on her finger.
   她的手指上涂了蓝色的指甲油。
2. 2. The blue nail polish was so bright that it almost looked like a rainbow.
   那蓝色的指甲油如此鲜艳，几乎像彩虹一样。
3. 3. He decided to change his blue nail polish to a more neutral shade.
   他决定把蓝色的指甲油换成一个更中性的颜色。